Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc9df79fc31dd0d…

MALICIOUS

PDF

186.5 KB Created: 2015-07-23 20:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c5dfaa0148e69fcf0fd4bba8eced9181 SHA-1: a98973fc2308548301e1dfa0f2c65bf062fcef84 SHA-256: 5fc9df79fc31dd0d1ff0d76898caeb38e7b22e784a7eb5b3c0902b0a4709e606
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary IOC is the malicious URL, which is likely used to lure the user to a site for phishing or to download further malware. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://botcraftman.ru/?lip&keyword=%D0%B2%D1%8B%D0%B9%D1%82%D0%B8+%D0%B7%D0%B0%D0%BC%D1%83%D0%B6+%D0%BB%D1%8E%D0%B1%D0%BE%D0%B9+%D1%86%D0%B5%D0%BD%D0%BE%D0%B9+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+fb2&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184545_realnuye_kimuy_egye_po_matematike_2015_5_iyunya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184435_nyensi_dryu_prizrak_venecii_skachat_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184329_faction_fronts_clear_sky_v221_skachat_torrent.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024269.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24269 3556 bytes
font_01_sfnt_off00024fec.bin
3dc3a4964cd372831759846f79d364f96740367c7a758cdc0acf19fb6e40d5bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24FEC 15016 bytes
font_02_sfnt_off00027eb1.bin
63bee659db5acfacf5bb8c91563c1ec2b88f7731a6bf1b4cf8bbfa63db260f96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27EB1 14912 bytes
font_03_sfnt_off0002aa2d.bin
0ddcc629b6ee6d814c68cf6c694ae7d095b25f3c288928bc139381d56d7afa91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA2D 7556 bytes
font_04_sfnt_off0002c058.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C058 6084 bytes
font_05_sfnt_off0002cfed.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFED 3752 bytes

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